Composition of matter for alloys



Patented June '8, 1926.

UNlTEDiSTATES PATENT OFFICE.

'RAY L. SPITZ'LEY AND ALLEN 12c; rnomrson, or nnrnorrr, MICHIGAN,assrenons r ALLOYS ronxnnx COMPANY, or nn'raorr, MICHIGAN, Aconrona'rrox or men:-

' GAN.

' COMPOSITION or. marrna'ro a ALLOYS.

No Drawingorlginal application filed November 15, 1924, Serial No.750,182. I Divided and this applia cation filed May 25, 1925. ,SerialNo. 32,882.

' The alloy herein set forth is a division of the composition set forthin the-patent apelements for formin making non-oxidlzab e castings, andpossess- 1 ing elements: nickel; manganese, iron, siliplication filedunder date of November I5, 1924, bearing the United States Series Number750,132, of which a division is required therein. v

Our invention relates to a composition of an alloy suitable for ing highheat resistin properties,

The ob'ect is to pr uce an alloy that'will fuse quic y to steel parts asmay be set in the moldfo'r casing therein, and yet solidify rapidlybefore melting or changing the inclosed .steel section.

' A further object is to produce an alloy that is no'n' oxidizable andcannot be changed inhardness' even when subjected to a big ly oxidizingflame or extreme heat temperatures.

It is common practice in manufacturin valves which are to be used inhigh spee gas engines, to use a turned steel valve stem and cast analloy head'thereon' by placing the steel stem within the mold beforepouring the molten alloy therein, thereby making a one piece valve whichis turned and machined into a perfect mechanical part.

The grade of alloy, having the desired properties may be predeterminedby a slight variation of the proportions of the elements comprisin thecomposition of the alloy. In

high spee engines, especially in aero-plane' engines, where the valvesare subject to extremely high heat temperatures, both valve cap and aportion of the valve stem are subjected to highly oxidizing conditions,and which result in man cases in scaling, pitting and warping o theexposed parts of the valve, or annealing and softening the metal,allowing it to jam against the engine valve seat and destroy the valve.An alloy suitable for this purpose requires high heat resistingproperties, and such that the molecular properties of the metal cannotbe changed nor affected by the heat, and is immune from oxidization'under all conditions. Our alloy is especially adapted for meeting theseconditions, and possess properties requisite to the effectivemanufacturing and operating of high speed gas engine valves.

This alloy being similar in character and properties tothe alloy setforth in the original patent heretofore referred to, although comprisina different combination of elements. L ke the former patent, itpossesses llOIl-OXldlZlIlg and non-molecular changing properties, and iscapable of bein rolled into sheets, or drawn into bars wit out effectingthe metal in any manner.

" In preparing our alloywe use the followcon, tungsten and copper,properly proportioned and fused together under a high temperature. Thepreferred proportions of the elements used for producing an alloy of thehighest heat and oxidizing resisting properties, are as follows weight:

I Per cent. Nickel 64 Manganese 7 Iron 14 Silicon 2 Tungstem- 1 Oopper12 This alloy has a fusing point between given in percentage by 3000 and{1000 degrees Fahrenheit, being of sufliciently high temperature toinstantly melt and fuse with the surface of any steel partthat may beplaced within the mold for casting-in, yet solidify almost instantlybefore destroying or changing the steel sec tion inclosed, even in thecase of thin small rods' as valve'stems, making the steel stem acomponentpart of the casting.

- While .theforegoing show the preferred proportions of elements used inour alloy, it is obvious that various modifications of the-proportionsof elements therein may be made for producing various grades of alloy,without departing from .our invention. Very efficient results'have beenobtained in resulting alloys by varying the proportion In Varying theproportions of any one or metal being similar to and closely associatedwith the metal cobalt, the resulting property of the alloy, when onemetal is substituted for the other therein, is practically the same, we,therefore claim the right to substitute cobalt for nickel throughoutthis patentwithout departing from our invention (but all references tometals of the nickel group are to include nickeland cobalt only).

' Very good results for commercial castingswhere high-heat resisting andnon-oxidizing propertles are not required, as for valves to be used inlow powered engines, or'castings under similar conditions, have beenobtained by us, by substituting aluminum in the place of v the tungstenin the above formula, and

which we also claim the right of substitu-- tion.

Having fully described our alloy, what We claim as our invention anddesire to secure by Letters Patent is:

1. A nonoxidizable alloy comprising nickel 64: percent, manganesepercent, iron '15 percent copper.

14 percent, silicon 2 percent, tungsten 1 percent, copper 12 percent.

2. A non-oxidizable making castings which will readily fuse with thesurface of inclosed steel parts, com-' prising a metal in the nickelgroup 64 percent, manganese 7 percent, iron 14 percent,

silicon 2 percent, tungsten 1 percent," and copper 12 percent.

3. A non-oxidizable alloy adapted for making castings or rolled intosheets or bars, comprising of from to percent nickel, from 4 to 10percentmanganese, from 5 to- 15 percent iron, from 3 percent silicon,from to-'2 percent tungsten, and from 5 to alloy adapted for f1. Anon-oxid1zable 'alloy adapted for re sisting high heat temperatures,comprising nickel 64- percent, manganese and silicon 9 percent, iron 1 1percent, tungsten 1 percent,

copper 12 percent.

5. An alloy adapted for making nonoxidizable and heat resistingcastings, comprising nickel 73 percent, manganese and silicon 10percent, iron 16 percent, tungsten 1 percent. K

In witness whereof tion.

\ I RAY SPITZLEY.

ALLEN M. THOMPSON.

we sign this specifica-.

